Answer:
Detailed ERD Diagram is given in the attachment
<span>network layer
hope it helped</span>
<span>Boolean expressions can be combined by using a logical operator to create compound expressions. A boolean expression is an expression that takes into account and evaluates specific data, which is in the form of true and/or false. A compound expression is merely a statement of expressions.</span>
In order for Rob to connect to the network,be must check all the connections he has in order to verify if it is physical problem or not. Let Rob check the wires and all the necessary devices like the routers and switches. If its not physical problem then check if the packets have gone out to the different layers of the network.
